Shortbread is one of those time honored more English afternoon tea faire that looks simple on paper and then quietly humbles you if you’re not paying attention. Seriously. I mean, it’s just butter, sugar, and flour. That’s it. No eggs, no leavening, nothing to hide behind. Which also means when you add something like tonka bean, it really gets its moment in the sun to shine.
If you haven’t used a tonka bean before, don’t feel bad because it is not a common ingredient in most home kitchens; its more reserved for upscale restaurant dessert menus. Tonka bean on a flavor front lands somewhere between vanilla, almond, and a warm spice. It’s subtle but layered, and in something like shortbread, it doesn’t compete with anything. It just settles in and takes over. This is a traditional shortbread structure with a small adjustment for texture. The cornstarch softens the crumb so the cookies have that melt-in-your-mouth feel instead of a snappy crunch. Like a meltway cookie meets shortbread almost! You’re aiming for tender and delicate, not crisp and dry.
The tonka is grated directly into the dough, which gives you a clean, even flavor throughout. No extracts, no extras. Although, you could totally infuse the butter if you want even more, and that on its own is time consuming but a very fun task to take on in this.
Shortbread dough can feel confusing if you haven’t made it a lot. Hence the “it can humble you” note. It doesn’t come together like typical cookie dough. It will look a little crumbly at first. That’s normal! What matters is this: If you press it in your hand and it holds together, you’re good. If it won’t hold at all, your dough is a little dry. That usually means the flour was a bit heavy or the butter didn’t fully incorporate. But no worries no worries…. this is an easy fix and happens to the best of us! Just add a small amount of softened butter or a splash of liquid until it comes together.
Tonka is strong, so this isn’t a “more is more” situation like with vanilla. A little goes a long way. 1/4 bean is a gentle start to the dough. I recommend freshly grating a 1/2 bean which is more present, more perfumed. You could go a teensy tiny bit more, but I would not go beyond 2/3. I know it doesn’t look like a lot, but you could easily go from flavor forward to overwhelmed. And once you go over too much you can’t go back! Better to be conservative.
As you cook these in the oven, keep the temperature moderate and don’t chase color too hard. These should stay mostly pale with just a light golden edge. If they brown too much, you lose that soft, buttery texture and drift into something a little too crisp. Use my photo above and the color I got for reference if you need it.
Tonka beans are truly magical, and once you start using them you will easily understand why they are loved by so many pastry chefs across the globe. They are a special addition to any bake. I love these because they are simple but feel like they are meant for a celebration, and I hope you feel that same love for them upon first bite!
Tonka Bean Shortbread Cookies
Equipment
- Mixing bowl (medium–large)
- Hand mixer or stand mixer
- Rubber spatula
- Measuring cups and spoons
- Microplane or fine grater
Ingredients
- 1 cup 226g unsalted butter, softened
- 1/2 cup 60g powdered sugar
- 1 3/4 cups 210g all-purpose flour
- 1/4 cup 30g cornstarch (for that soft, delicate crumb)
- 1/2 tsp fine sea salt
- 1/4 to 1/2 tonka bean finely grated (use a microplane)
- 1 tsp vanilla extract
Instructions
- In a bowl, beat the softened butter and powdered sugar until smooth and fluffy, about 2–3 minutes.
- Mix in the vanilla extract and finely grated tonka bean. Start light—you can always add more next time, but you can’t take it out.
- In a separate bowl, whisk together flour, cornstarch, and salt.
- Add to the butter mixture and mix just until a soft dough forms. Don’t overwork it.
- Form dough into a disk or log. Wrap and chill for at least 30 minutes (this keeps the cookies from spreading too much).
- Preheat oven to 325°F (163°C).
- Roll dough to about 1/4-inch thick and cut into shapes, or slice from a log.
- Place on a lined baking sheet and bake for 14–18 minutes, until edges are just barely golden. You want them pale, not browned.
- Cool slightly, then dust with powdered sugar or sprinkle with a tiny pinch of flaky salt.
Notes
Texture trick: The cornstarch is what gives that melt-in-your-mouth, almost sandy texture. Don’t skip it.
Flavor direction: If you want to lean more “dessert-y,” add a little lemon or orange zest. If you want it deeper, pair with dark chocolate drizzle.
Storage: Keeps well in an airtight container for 5–7 days. Flavor actually improves after a day.